/* ============================================
   Meltric Sales - Modern Responsive Stylesheet
   Mobile-First Design with CSS Grid & Flexbox
   Updated for 2025
   ============================================ */

/* CSS Custom Properties */
:root {
  /* Brand Colors - refined */
  --color-primary: #C41230;
  --color-primary-dark: #9E0E27;
  --color-primary-light: #E8143A;
  --color-secondary: #1a1a2e;
  --color-accent: #16213e;

  /* Neutrals - modern palette */
  --color-gray-900: #1a1a1a;
  --color-gray-800: #2d2d2d;
  --color-gray-700: #404040;
  --color-gray-600: #525252;
  --color-gray-500: #737373;
  --color-gray-400: #a3a3a3;
  --color-gray-300: #d4d4d4;
  --color-gray-200: #e5e5e5;
  --color-gray-100: #f5f5f5;
  --color-gray-50: #fafafa;
  --color-white: #FFFFFF;

  /* Semantic colors */
  --color-text: var(--color-gray-800);
  --color-text-muted: var(--color-gray-600);
  --color-link: var(--color-primary);
  --color-link-hover: var(--color-primary-dark);
  --color-border: var(--color-gray-200);
  --color-bg-subtle: var(--color-gray-50);

  /* Modern font stack */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-heading: var(--font-family);

  /* Typography scale */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  --line-height-tight: 1.25;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing scale */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Layout */
  --container-max-width: 1200px;
  --sidebar-width: 320px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Borders */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-gray-50);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-link-hover);
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -50px;
  left: var(--spacing-md);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: var(--spacing-md);
  color: var(--color-white);
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  background-color: var(--color-white);
  padding: var(--spacing-md) 0;
}

.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.header-logos {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.header-logos a {
  display: block;
}

.header-logos img {
  max-height: 60px;
  width: auto;
  height: auto;
}

.header-logo {
  max-width: 250px;
}

.header-logo img {
  max-width: 100%;
  height: auto;
}

.header-contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: center;
}

.header-phone {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-gray-900);
  letter-spacing: -0.025em;
  white-space: nowrap;
}

.header-phone a {
  color: var(--color-gray-900);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.header-phone a:hover {
  color: var(--color-primary);
}

.header-credit-cards img {
  height: 24px;
  width: auto;
  opacity: 0.8;
}

/* Header accent bar - ties in with original gray theme */
.header-bar {
  background: linear-gradient(to bottom, var(--color-gray-400), var(--color-gray-500));
  height: 6px;
}

/* ============================================
   PRODUCT PAGE HEADER STYLES
   Alternative header structure used by product pages
   ============================================ */
.header-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--color-white);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.header-top .header-logos {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.header-top .header-logos a {
  display: block;
}

.header-top .header-logos img {
  max-height: 60px;
  width: auto;
}

.header-top > a {
  display: block;
  max-width: 250px;
}

.header-top > a img,
.header-top .logo,
.header-top > img {
  max-width: 250px;
  max-height: 60px;
  height: auto;
  width: auto;
}

.header-top .header-contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: center;
}

.header-top .phone {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-gray-900);
  letter-spacing: -0.025em;
}

.header-top .credit-cards {
  height: 24px;
  width: auto;
  opacity: 0.8;
}

/* Alternative header classes used by some pages */
.header-top .header-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: center;
}

.header-top .phone-numbers {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-gray-900);
  letter-spacing: -0.025em;
}

.header-top .phone-numbers a {
  color: var(--color-gray-900);
  text-decoration: none;
}

.header-top .phone-numbers a:hover {
  color: var(--color-primary);
}

/* Alternative dropdown class */
.dropdown-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: none;
  background: var(--color-primary);
}

.dropdown-menu li a {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  padding-left: var(--spacing-xl);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 400;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background var(--transition-fast);
}

.dropdown-menu li a:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

.nav-menu > li.has-dropdown.is-open > .dropdown-menu {
  display: block;
}

/* Main navigation for product pages */
.main-nav {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
  border-bottom: 4px solid var(--color-primary);
  padding: 0 var(--spacing-md);
}

.main-nav .nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-white);
}

.main-nav .nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-menu {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  display: none;
  flex-direction: column;
  background: var(--color-secondary);
  max-width: var(--container-max-width);
}

.nav-menu.is-open {
  display: flex;
}

.nav-menu > li {
  position: relative;
}

.nav-menu > li > a {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-menu > li > a:hover,
.nav-menu > li > a:focus {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
}

/* Dropdown arrow for product pages */
.nav-menu > li.has-dropdown > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: var(--spacing-sm);
  vertical-align: middle;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform var(--transition-fast);
}

/* Dropdown menu for product pages */
.dropdown {
  list-style: none;
  margin: 0;
  padding: 0;
  display: none;
  background: var(--color-primary);
}

.dropdown li a {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  padding-left: var(--spacing-xl);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 400;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background var(--transition-fast);
}

.dropdown li a:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

/* Mobile: Show dropdown when parent has is-open class */
.nav-menu > li.has-dropdown.is-open > .dropdown {
  display: block;
}

/* ============================================
   NAVIGATION
   ============================================ */
.site-nav {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
  border-bottom: 4px solid var(--color-primary);
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-white);
  gap: var(--spacing-sm);
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 22px;
  height: 16px;
}

.nav-toggle-icon span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Hamburger Animation */
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Navigation List */
.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: none;
  flex-direction: column;
  background: var(--color-secondary);
}

.nav-list.is-open {
  display: flex;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
}

/* Dropdown Arrow */
.nav-item.has-dropdown > .nav-link::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: var(--spacing-sm);
  vertical-align: middle;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform var(--transition-fast);
}

.nav-item.has-dropdown:hover > .nav-link::after,
.nav-item.has-dropdown.is-open > .nav-link::after {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.nav-dropdown {
  list-style: none;
  margin: 0;
  padding: 0;
  display: none;
  background: var(--color-primary);
}

.nav-dropdown .nav-link {
  padding-left: var(--spacing-xl);
  font-size: var(--font-size-sm);
  font-weight: 400;
}

.nav-dropdown .nav-link:hover {
  background: var(--color-primary-dark);
}

/* Mobile: Show dropdown when parent is focused/active */
.nav-item.has-dropdown.is-open > .nav-dropdown {
  display: block;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
.site-main {
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
  background: var(--color-gray-50);
}

.page-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

/* Container constraints for product pages (no .site-main wrapper) */
main:not(.site-main) {
  background: var(--color-gray-50);
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
}

main:not(.site-main) > .page-layout {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.main-content {
  min-width: 0;
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* Sidebar */
.sidebar {
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.sidebar-section {
  margin-bottom: var(--spacing-xl);
}

.sidebar-section:last-child {
  margin-bottom: 0;
}

.sidebar-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-gray-900);
  margin: 0 0 var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-primary);
}

.sidebar ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar li {
  margin-bottom: var(--spacing-sm);
}

.sidebar li a {
  display: block;
  padding: var(--spacing-sm) 0;
  color: var(--color-text);
  font-weight: 500;
  border-bottom: 1px solid var(--color-gray-100);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.sidebar li a:hover {
  color: var(--color-primary);
  padding-left: var(--spacing-sm);
}

/* Featured Products */
.featured-product {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.featured-product:last-child {
  border-bottom: none;
}

.featured-product-image {
  flex-shrink: 0;
  width: 80px;
}

.featured-product-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.featured-product-info {
  flex: 1;
}

.featured-product-info p {
  margin: 0 0 var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.featured-product-links {
  margin-top: var(--spacing-sm);
}

.featured-product-links a {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

/* Quote Button */
.quote-button {
  display: block;
  text-align: center;
}

.quote-button img {
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.quote-button:hover img {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   CONTENT TYPOGRAPHY & ELEMENTS
   ============================================ */
.main-content h1,
.page-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-gray-900);
  margin: 0 0 var(--spacing-lg);
  line-height: var(--line-height-tight);
  letter-spacing: -0.025em;
}

/* Product Page Title - replaces graphic text headers */
.product-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  margin: 0 0 var(--spacing-md);
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

@media (min-width: 768px) {
  .product-title {
    font-size: var(--font-size-4xl);
  }
}

.main-content h2 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin: var(--spacing-xl) 0 var(--spacing-md);
  line-height: var(--line-height-tight);
}

.main-content h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin: var(--spacing-lg) 0 var(--spacing-md);
}

.main-content p {
  margin: 0 0 var(--spacing-md);
  color: var(--color-text);
}

.main-content ul {
  margin: 0 0 var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.main-content li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.main-content strong {
  font-weight: 600;
  color: var(--color-gray-900);
}

/* Content Box */
.content-box {
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-lg) 0;
}

/* Float Images */
.float-right {
  float: right;
  margin: 0 0 var(--spacing-md) var(--spacing-lg);
  max-width: 45%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.float-left {
  float: left;
  margin: 0 var(--spacing-lg) var(--spacing-md) 0;
  max-width: 45%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

/* Image with Border */
.img-border {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* Horizontal Line */
.content-divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-gray-300), transparent);
  border: none;
  margin: var(--spacing-xl) 0;
}

/* Video Link */
.video-link {
  display: inline-block;
  margin: var(--spacing-md) 0;
  transition: transform var(--transition-base);
}

.video-link:hover {
  transform: scale(1.02);
}

.video-link img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* ============================================
   PRODUCT GRID (for product listing pages)
   ============================================ */
.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card img {
  margin: 0 auto var(--spacing-md);
  border-radius: var(--radius-md);
}

/* ============================================
   LITERATURE PAGE - PDF GRID
   ============================================ */
.pdf-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.pdf-item {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.pdf-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pdf-item img {
  margin: 0 auto var(--spacing-sm);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.pdf-item a {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-top: var(--spacing-sm);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-secondary);
  color: var(--color-white);
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.footer-content {
  font-size: var(--font-size-base);
}

.footer-content p {
  margin: 0 0 var(--spacing-sm);
}

.site-footer a,
.footer-content a {
  color: var(--color-white) !important;
  font-weight: 600;
  transition: opacity var(--transition-fast);
}

.site-footer a:hover,
.footer-content a:hover {
  opacity: 0.8;
  color: var(--color-white) !important;
}

.footer-logo {
  margin-bottom: var(--spacing-lg);
}

.footer-logo img {
  max-width: 200px;
  height: auto;
  margin: 0 auto;
}

.footer-address {
  margin-top: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  font-weight: 400;
}

.footer-address a {
  color: var(--color-gray-300);
  font-weight: 400;
}

/* ============================================
   INDUSTRY PAGES GRID
   ============================================ */
.industry-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.industry-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.industry-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.industry-item img {
  flex-shrink: 0;
  width: 120px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* ============================================
   TABLES (for specs/data)
   ============================================ */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  font-size: var(--font-size-sm);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.spec-table th,
.spec-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-gray-100);
}

.spec-table th {
  background: var(--color-secondary);
  color: var(--color-white);
  font-weight: 600;
  text-transform: uppercase;
  font-size: var(--font-size-xs);
  letter-spacing: 0.05em;
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table tr:hover td {
  background: var(--color-gray-50);
}

/* Responsive table wrapper */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
  text-align: center;
}

.text-bold {
  font-weight: 600;
}

.mb-0 {
  margin-bottom: 0;
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   BREAKPOINT: SMALL (576px+)
   ============================================ */
@media (min-width: 576px) {
  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .header-contact {
    flex-direction: row;
    gap: var(--spacing-lg);
    align-items: center;
  }

  .header-phone {
    font-size: var(--font-size-xl);
  }

  /* Product page header responsive */
  .header-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .header-top .header-contact {
    flex-direction: row;
    gap: var(--spacing-lg);
    align-items: center;
  }

  .header-top .phone {
    font-size: var(--font-size-xl);
  }

  .header-top .header-right {
    flex-direction: row;
    gap: var(--spacing-lg);
    align-items: center;
  }

  .header-top .phone-numbers {
    font-size: var(--font-size-xl);
  }

  .pdf-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   BREAKPOINT: MEDIUM (768px+)
   ============================================ */
@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

  /* Header */
  .header-phone {
    font-size: var(--font-size-2xl);
  }

  /* Product page header */
  .header-top .phone {
    font-size: var(--font-size-2xl);
  }

  /* Navigation - Desktop */
  .nav-toggle {
    display: none;
  }

  .main-nav .nav-toggle {
    display: none;
  }

  .nav-list {
    display: flex;
    flex-direction: row;
    justify-content: center;
    background: transparent;
  }

  .nav-link {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: none;
    border-radius: var(--radius-md);
  }

  .nav-link:hover,
  .nav-link:focus {
    background: rgba(255, 255, 255, 0.15);
  }

  /* Desktop Dropdowns */
  .nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin-top: var(--spacing-sm);
  }

  .nav-dropdown .nav-link {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0;
  }

  /* CSS-only dropdown on hover/focus */
  .nav-item:hover > .nav-dropdown,
  .nav-item:focus-within > .nav-dropdown {
    display: block;
  }

  /* Product page navigation - Desktop */
  .nav-menu {
    display: flex;
    flex-direction: row;
    justify-content: center;
    background: transparent;
  }

  .nav-menu > li > a {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: none;
    border-radius: var(--radius-md);
  }

  .nav-menu > li > a:hover,
  .nav-menu > li > a:focus {
    background: rgba(255, 255, 255, 0.15);
  }

  /* Product page desktop dropdowns */
  .dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin-top: var(--spacing-sm);
  }

  .dropdown li a {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0;
  }

  /* CSS-only dropdown on hover/focus for product pages */
  .nav-menu > li.has-dropdown:hover > .dropdown,
  .nav-menu > li.has-dropdown:focus-within > .dropdown {
    display: block;
  }

  /* Alternative dropdown-menu desktop styles */
  .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    margin-top: var(--spacing-sm);
  }

  .dropdown-menu li a {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0;
  }

  .nav-menu > li.has-dropdown:hover > .dropdown-menu,
  .nav-menu > li.has-dropdown:focus-within > .dropdown-menu {
    display: block;
  }

  .header-top .phone-numbers {
    font-size: var(--font-size-2xl);
  }

  /* Two-column layout begins */
  .page-layout {
    grid-template-columns: 1fr var(--sidebar-width);
  }

  .main-content {
    padding: var(--spacing-2xl);
  }

  .sidebar {
    padding: var(--spacing-xl);
  }

  .industry-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pdf-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   BREAKPOINT: LARGE (992px+)
   ============================================ */
@media (min-width: 992px) {
  :root {
    --sidebar-width: 350px;
  }

  .container {
    padding: 0 var(--spacing-xl);
  }

  .nav-link {
    padding: var(--spacing-md) var(--spacing-xl);
  }

  /* Product page nav at large size */
  .nav-menu > li > a {
    padding: var(--spacing-md) var(--spacing-xl);
  }

  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .pdf-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .industry-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Larger floating images on desktop */
  .float-right,
  .float-left {
    max-width: 40%;
  }
}

/* ============================================
   BREAKPOINT: EXTRA LARGE (1200px+)
   ============================================ */
@media (min-width: 1200px) {
  .main-content h1,
  .page-title {
    font-size: var(--font-size-4xl);
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .site-nav,
  .nav-toggle,
  .skip-link {
    display: none;
  }

  body {
    background: white;
  }

  .page-layout {
    grid-template-columns: 1fr;
  }

  .main-content,
  .sidebar {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .sidebar {
    page-break-before: always;
  }

  a {
    color: var(--color-gray-900);
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: var(--color-gray-600);
  }
}